/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package com.ambow.util;

public abstract class EqualsUtil {

	public static boolean equals(Object thisObject, Object otherObject) {
		if ((thisObject == null) || (otherObject == null))
			return false;

		if (isProxy(otherObject)) {
			return otherObject.equals(thisObject);
		} else {
			return otherObject == thisObject;
		}
	}

	static boolean isInitialized = false;
	static boolean isHibernateInClasspth = true;
	static Class hibernateProxyClass = null;

	static boolean isProxy(Object otherObject) {
		boolean isProxy = false;
		if (!isInitialized)
			initializeHibernateProxyClass();

		if (isHibernateInClasspth) {
			return hibernateProxyClass.isAssignableFrom(otherObject.getClass());
		}
		return isProxy;
	}

	static synchronized void initializeHibernateProxyClass() {
		try {
			hibernateProxyClass = ClassLoaderUtil.getClassLoader().loadClass(
					"org.hibernate.proxy.HibernateProxy");
		} catch (ClassNotFoundException e) {
			isHibernateInClasspth = false;
		}
		isInitialized = true;
	}
}
